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Systems and methods for flow control of a remote transmitter

a remote transmitter and flow control technology, applied in the field of digital communications, can solve the problems of significant reduction of data transfer at the application layer, loss of information, and retransmission of original data

Inactive Publication Date: 2013-11-26
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation often arises when the destination is busy with other tasks or is processing previously received data and therefore is not ready to receive information from the near-end receiver's TC layer.
The dropped information is lost, and this loss is usually detected at a higher layer, such as a web browser application, which forces a retransmission of the original data.
Because detection of lost information is done at a higher layer, and because there is significant latency involved in getting information to the higher layer, this retransmission can cause a significant reduction in data transfer at the application layer.

Method used

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  • Systems and methods for flow control of a remote transmitter
  • Systems and methods for flow control of a remote transmitter
  • Systems and methods for flow control of a remote transmitter

Examples

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Embodiment Construction

[0018]Systems and methods are provided herein for enabling a near-end receiver, in a DSL system, to control the data transmission by a far-end transmitter such that the near-end receiver's TC data buffers do not overflow, which improves overall communications rates. Advantageously, attributes of existing deployed DSL equipment are exploited in accordance with disclosed embodiments, and thus no modifications to equipment already deployed in the field are required for flow control to be achieved.

1. Overview of DSL System

[0019]An exemplary DSL loop system 100 will now be explained with reference to FIG. 1. Customer 102 receives DSL services from central office 104 via local loop 106. Network interface device (NID) 110 is used to interface devices to local loop 106. For example, telephone 108 connects to NID 110 to receive services from central office 104. Computer 112 connects to NID 110 through a modem or termination unit (TU) 114. A signal splitter (not shown) within NID 110 passes l...

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Abstract

Systems and methods are provided to enable a near-end receiver to control the far-end transmitter's data transmission such that the near-end receiver's TC data buffers do not overflow. In an embodiment, a high waterline and low waterline implemented into a near-end receiver are used to determine when the near-end receiver's TC data buffers are near maximum capacity. In an embodiment, the near-end receiver transmits a Packet Transfer Mode (PTM) All Idle Out Of Sync (AIOOS) codeword to the far-end transmitter when the high waterline is reached, and the near-end receiver stops transmitting the AIOOS codeword when the low waterline is reached.

Description

FIELD OF THE INVENTION[0001]This invention relates to digital communications and more specifically to communications over Digital Subscriber Line (DSL) equipment.BACKGROUND OF THE INVENTION[0002]Digital Subscriber Line (DSL) is a family of technologies used to provide digital data transmission over a local telephone network. By sending signals over the telephone line at high frequencies, DSL can transform an ordinary telephone line (e.g., twisted-pair) into a broadband communications link.[0003]Over the years, DSL technology has evolved into a family of specific implementations and standards. These various implementations offer a variety of transmission speeds and transmission distances and include, for example, High Speed DSL (HDSL), Symmetrical or Single Pair DSL (SDSL), Symmetric High Speed DSL (SHDSL), Asymmetric DSL (ADSL), Very High Speed DSL (VDSL), and Rate Adaptive DSL (RADSL). The various DSL implementations that have evolved over the years may be collectively referred to ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04B1/38H04L5/16H04L49/901H04L47/30
CPCH04L7/005H04L7/10H04L12/2881H04L47/30H04L49/901H04L47/18H04M11/062Y02B60/36Y02D30/50
Inventor DESJARDINS, PHILIP
Owner AVAGO TECH WIRELESS IP SINGAPORE PTE